期刊
JOURNAL OF NUCLEAR MATERIALS
卷 549, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jnucmat.2021.152870
关键词
Pressurized water reactor (PWR); Crud; Induced power shift (CIPS); Van der Waals force; Titanium nitride; Ni; Fe ratio; Corrosion related unidentified deposit (crud)
资金
- National Nuclear R&D program by the National Research Foundation (NRF) [NRF-2017M2A8A4015160]
- Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning - Ministry of Trade Industry and Energy, Republic of Korea [20194030202400]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20194030202400] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017M2A8A4015160] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study demonstrates that the titanium nitride coating effectively reduces the deposition thickness of crud on pressurized water reactor fuel cladding, and increases the Ni/Fe ratio of the crud, which may help mitigate crud-induced power shifts.
A titanium nitride film was applied to mitigate the deposition of fouling deposits (crud) on pressurized water reactor fuel cladding. Titanium nitride was chosen as it reduces the van der Waals force, believed to be the dominant surface force at pressurized water reactor conditions, between crud and the substrate. Crud deposition experiments were conducted in a heated, flowing pressurized water reactor-simulant loop with uncoated and titanium nitride-coated Zr-Nb-Sn alloy tubes for 1?2 weeks. Crud morphology and thickness were investigated using focused ion beam?scanning electron microscopy, and crud chemical composition was measured via energy-dispersive X-ray spectroscopy. Results demonstrate that the titanium nitride coating effectively reduced crud deposition thickness compared to uncoated Zr-Nb-Sn alloy in the 2-week experiment. In addition, the titanium nitride coating increased the Ni/Fe ratio of the crud, which may help mitigate crud-induced power shifts. ? 2021 Elsevier B.V. All rights reserved.
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